000 00274 a2200109 4500
005 20220526011520.0
022 _a0038-3506
245 _aPublic Health
260 _aLondon
_bAcademic Press
_c1977
490 _aJournal of the Society of Community Medicine
_v91
942 _2lcc
_cCR
999 _c24908
_d24908